Sonic Prime Flashback's sprites in Advance Style 👍 (Artist: @Kanimy_0) : r/SonicTheHedgehog

Green Hill Zone – Duth Olec's Cuckoo Cosmos

Steam Workshop::Green Hill Zone

The Leaf Forest Zone - Sonic Advance backgrounds

Sonic the Hedgehog - Green Hill Zone by SonicDash57 on DeviantArt

Pixel Joint Forum: Sonic 1 Title separate BG sprites?

The Spriters Resource - Full Sheet View - Sonic the Hedgehog (Prototype) - Green Hill Zone Act. 1 (Normal)

Sonic 1 green hill zone sprites

Pack de tiles da Green Hill Zone! :D

The VG Resource - Dolphman's sprite library of customs & edits

MerrydriveMarcy on X: Replaced the background and frontground with Emerald Hill sprites! (Because the first week is against Sonic from Sonic 2) #Sonic #SonicTheHedgehog #SonicMania #Sonic1 #Sonic2 #SonicTheHedgehog2 #SonicTheHedgehog1 #FNF